Consumer Electronic Servicing NC II PDF

Program/Course CONSUMER ELECTRONIC SERVICING NC II MAINTAIN AND REPAIR OF AUDIO PRODUCTS AND Unit of Competency SYSTEM MAINTAINING AND REPAIRING AUDIO PRODUCTS Module Title AND SYSTEM...

Program/Course CONSUMER ELECTRONIC SERVICING NC II MAINTAIN AND REPAIR OF AUDIO PRODUCTS AND Unit of Competency SYSTEM MAINTAINING AND REPAIRING AUDIO PRODUCTS Module Title AND SYSTEM INTRODUCTION: This module contains information and suggested learning activities on maintaining and repairing Audio Products and Systems. It covers attitudes required to the knowledge, and skill. Completion of this module will help you better understand the succeeding module on performing computer operation. This module consists of three learning outcomes. Each learning outcome contains learning activities supported by instruction sheets. Before you perform the instructions, read the information sheets and answer the self-check and activities provided to ascertain to yourself and your instructor that you have acquired the knowledge necessary to perform the skill portion of the particular learning outcome. Upon completing this module, report to your teacher for an assessment to check your achievement of knowledge and skills requirements of this module. If you pass the assessment, you will be given a certificate of completion. SUMMARY OF LEARNING OUTCOMES: Upon completion of the module you should be able to: LO1 prepare audio tools and workplace for maintenance /repair of audio products; LO2 diagnose faults of audio products and system and LO3 maintain / repair products and system. 1  TECHNICAL TERMS Active State. A condition of a semi conductor device that is working Ampere. A unit of electric current, or amount of electric charge per second Capacitance. A measure of the amount of electric charge stored (or separated) for a given electric potential Conductance. A measure of how easily an electricity flows along a certain path through an electrical element Current. The flow (movement) of electric charge. Decibel. A logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. Digital. Use as discrete (that is, discontinuous) values to represent information for input, processing, transmission, storage, etc Duty Cycle. It is the proportion of time during which a component, device, or system is operated. Error. Refers to a difference between actual behavior or measurement and the norms or expectations for the behavior or measurement Farad. Defined as the amount of capacitance for which a potential difference of one volt results in a static charge of one coulomb Frequency. A measure of the number of occurrences of a repeating event per unit of time. Henry. The SI unit of inductance Inductance. An electric current flowing around a circuit produces a magnetic field and hence a magnetic flux Φ through the circuit Injury. Damage or harm caused to the structure or function of the body caused by an outside agent or force, which may be physical or chemical Insulation. A material that resists the flow of electric current Ohm. (symbol: Ω) it is the SI unit of electrical impedance or, in the direct current case, electrical resistance. Potential Differences. In physics, the potential difference between two points is the amount of work that would need to be done on a unit electric charge to move it from one point to the other against an electric field 2 Siemen. The SI derived unit of electric conductance. It is equal to inverse ohm. It is named after the German inventor and industrialist Ernst Werner von Siemens, and is equivalent to the previously used designation of this unit, the ohm. Solder. It is a fusible metal alloy with a melting point or melting range of 90 to 450 °C (200 to 840 °F), used in a process called soldering where it is melted to join metallic surfaces. It is especially useful in electronics and plumbing Troubleshooting. It is a form of problem solving. It is the systematic search for the source of a problem so that it can be solved. It is often a process of elimination - eliminating potential causes of a problem. It is used in many fields such as system administration and electronics Voltage. It is sometimes also called electric or electrical tension. The difference of electrical potential between two points of an electrical or electronic circuit, expressed in volts Voltage Drop. The reduction in voltage in an electrical circuit between the source and load. In electrical wiring national and local electrical codes may set guidelines for maximum voltage drop allowed in a circuit, to ensure reasonable efficiency of distribution and proper operation of electrical equipment (the maximum permitted voltage drop varies from one country to another). Wattage. Symbol: W The SI derived unit of power, equal to one joule of energy per second 3 Program/Course CONSUMER ELECTRONIC SERVICING NCII MAINTAIN AND REPAIR AUDIO PRODUCTS AND Unit of Competency SYSTEM MAINTAINING AND REPAIRING AUDIO PRODUCTS Module Title AND SYSTEM Learning Outcome 1: Prepare audio tools and workplace for maintenance/repair of audio products. Assessment Criteria: 1. Work station is cleaned for repair activities in line with a company requirements. 2. Necessary tools, test instruments and Personal Protective Equipment are prepared in accordance with their application or uses. 3. Service manuals and service information required for repair and maintenance are acquired used as references. Conditions: The following resources are needed:  Equipment - AM-FM Radio Receiver - AM Radio Receiver - DVD / VCD Player - Professional audio/public address (PA) system (power amplifier) - MP3/MP4  Instruments - Signal Generator – AF / RF - Analog / Digital VOM - Oscilloscope - Power Supply - Audio Frequency Counter - Distortion Analyzer  Electronic Hand Tools - Soldering Iron - Soldering Stand 4  - Desoldering Tool - Set of Screw Driver (Philips, Flat) - Pliers  Long Nose pliers  Diagonal pliers - Utility Knife - Cleaning Brush  Supplies and Materials - Electronic Components - Soldering Lead - Wires - Silicon Grease - Soldering Flux - Requisition Slip  Accessories  Personal Protective Equipment (PPE) - Working clothes - Hand gloves - Mask - Goggles  Learning Materials - Work Plan - Service Manual - IC Manual - Learning Elements 5  LEARNING EXPERIENCE / ACTIVITIES Learning Outcome 1: Prepare audio tools and workplace for maintenance/repair of audio products. Learning Activities Special Instructions 1. Read Information Sheet 9A-1-1 regarding 5S application. 2. Do the actual Laboratory Activity  Perform the activity with the Sheet 9A-1-1. supervision of the teacher. 3. Refer to the Assessment Criteria 9A-1-1. 4. Read the Information Sheet 9A- 1-2 Tools, Equipment, and Devices for Repairing Audio Products and Systems. 5. Do the preliminary set-up before starting the use of appropriate  Try to do the Student-Check hand tools, test instruments and 9A-1-2. personal protective equipment. 6. If you have any questions or you need clarification on the information, ask assistance from your teacher or from your classmate who has finished this learning outcome (LO). 7. If you have answered all the questions and finished all the laboratory activities, you may proceed to the next learning outcome (LO). 6  INFORMATION SHEET 1.1 5S Application The 5S's are:  Sorting. Refers to the practice of going through all the tools, materials, etc  Simplifying. It means arranging the tools and equipment in an order that promotes workflow.  Sweeping, Systematic Cleaning, or Shining. Indicates the need to keep the workplace clean as well as neat.  Standardizing. Refers to more than standardized cleanliness (otherwise this would mean essentially the same as "systemized cleanliness").  Sustaining. Refers to maintaining and reviewing standards. 7  ACTIVITY SHEET 1.1 5’S Application Instructions: 1. Students will be grouped with 10 members. 2. Apply 5’S in your shop work. 3. You must get a score of 7-9 to have a rating of Very Good the teacher – assessment criteria 1-1. TEACHER-CHECK SHEET 1.1 5’S Application Direction: The teacher will prepare a man-made activity for the students to work on. 5’S Item Activity 70 75 80 85 90 95 100 Score no. A Sorting B Simplifying Sweeping, Systematic C Cleaning, or Shining D Standardizing E Sustaining Average -------- Assessment Criteria 1.1 Score Descriptive Grade 96-100 Excellent 86-95 Very good 81-85 Good 75-80 Fair 70-74 Poor 8  INFORMATION SHEET 1.2 Tools, Equipment and Devices for Repairing Audio Products and System Basic Hand Tools  Driving Tools Screw Driver is a device specifically designed to insert and tighten, or to loosen and remove screws. The screwdriver comprises a head or tip which engages with a screw, a mechanism to apply torque by rotating the tip, and some way to position and support the screwdriver. A typical hand screwdriver comprises an approximately cylindrical handle of a size and shape to be held by a human hand, and an axial shaft fixed to the handle, the tip of which is shaped to fit a particular type of screw. The handle and shaft allow the screwdriver to be positioned and supported and to apply torque when rotated. Handle Head or Tip Slotted Screw Driver is used to drive or fasten negative slotted screws. Phillips Screw Driver is used to drive or fasten positive slotted screws. It is a screw driver that could take greater torque and could provide tighter fastenings. 9 Torx Screw Driver Set is used to drive or fasten six pointed star screws. In modern electrical appliances, they use screws with heads of non-standard shape to prevent users of the device from easily disassembling them. Hex (Allen Wrench) is used to drive or fasten hexagonal screws. The head has hexagonal hole turned by an Allen key. An Allen key is a hexagonal shaped wrench bended in letter-L. The Allen key was invented by an American, Gilbert F. Heublein. Jeweler's Screwdriver Set – This is a set of small screw drivers composed of slotted and Philips screw drivers. 10 Socket Wrench Is a type of wrench or tightening tool that uses separate, removable sockets to fit many different sizes of fittings and fasteners, most commonly nuts and bolts. It generally includes a ratcheting mechanism that allows the nut to be tightened or loosened with a continuous motion, rather than requiring that the wrench be removed and refitted after each turn. Typically, a lever behind the socket switches the wrench between tightening and loosening modes. The sockets attach to the ratchet through a square fitting that locks onto them and come in four common sizes: 1/4 inch, 3/8 inch, 1/2 inch, and 3/4 inch.  Soldering Tools Soldering Iron is a device for applying heat to melt solder for attaching two metal parts. A soldering iron is composed of a heated metal tip and an insulated handle. Heating is often achieved electrically, by passing a current, supplied through an electrical cord, through a heating element. For electrical work, wires are usually soldered to printed circuit boards, other wires, or small terminals. A low-power iron (15-30 Watts) is suitable for this work. 11 Some soldering irons have interchangeable tips for different types of work. Fine round or chisel tips are typically used for electronics work. A new tip needs to be coated, heated, and then covered with solder before its first use. This procedure is called "tinning". The tinning forms a liquid layer which facilitates the transfer of heat to the work piece. A dirty tip does not transfer heat well. The tip needs to be kept coated with a shiny layer of solder by occasional wiping and applying solder directly to the tip. Soldering Tool Stand is a place of the soldering iron to keep them away from flammable materials. The stand often comes with a sponge and flux pot for cleaning the tip. Desoldering Sucker is used to remove or to solder components from a circuit for the propose of troubleshooting, repairing and removing components.  Splicing Tools Long Nose is used for holding, bending and stretching the lead of electronics component or connecting wire. 12 Side Cutters are wire-cutting pliers. Though they are not used to grab or turn anything, they are useful to cut wire. Wire Stripper is a pair of opposing blades much like scissors or wire cutters. The addition of a center notch makes it easier to cut the insulation without cutting the wire. This type of wire stripper is used by rotating it around the insulation while applying pressure in order to make a cut around the insulation. Since the insulation is not bonded to the wire, it then pulls easily off the end. Notch  Boring Tools 12V Mini-Drill is used to bore or drill hole in the printed circuit board (pcb). 13 Portable Electric Drill is used for boring hole/s in the plastics chassis or metal chassis with the used of drill bits. Metal Files are hand tool used to shape metals by grinding. A file series of sharp, parallel ridges or teeth. Most files have a narrow, pointed tang at one end to which a handle can be fitted. Flat Files – are parallel in width and tapered in thickness They are used for flat surfaces and edges. Round File also called rat-tail files is gradually tapered and is used for many tasks that require a round tool, such as enlarging round holes or cutting a scalloped edge. Narrow Pointed Tang Round File Flat File  Cutting Tools - are used for cutting materials. Utility Knife is a common tool used in cutting various trades and crafts for a variety of purposes. 14 Hacksaw is a saw for cutting metal. Some of them have pistol grips which keep the hacksaw firm and easy to grip. The small hand-held hacksaws consist of a metal arch with a handle that fits around a narrow, rigid blade. The blade has many small saw teeth along one side. It can either be attached such that the teeth face away from the handle, resulting in sawing action by pushing. On the push stroke, the arch will be bent a little, releasing the tension on the blade. The blade is normally quite brittle, so care needs to be taken to prevent brittle fracture of the blade. Pistol Grip Blade Handle  Auxiliary Tools Ball-peen Hammer is a type of hammer used in metalworking. The ball-peen hammer remains useful for many tasks such as tapping punches and chisels. The original function of the hammer was to "peen" riveted or welded material so that it will exhibit the same elastic behavior as the surrounding material. Specifically, striking the metal imparts a stress at the point of impact which results in strain-hardening of that area. Strain hardening raises the elastic limit of a material into the plastic range without affecting its ultimate strength. A strain-hardened material will not deform under the same low stresses as a non- hardened material. Most metals can be "worked" by such methods until they lose all of their ductile characteristics and become strong but brittle 15 Magnifying Glass with a convex lens is used to magnify an object. The lens is usually mounted in a frame with a handle (see image). Roger Bacon is the original inventor of the magnifying glass. A magnifying glass works by creating a magnified virtual image of an object behind the lens. The distance between the lens and the object must be shorter than the focal length of the lens for this to occur. Otherwise, the image appears smaller and inverted, and can be used to project images onto surfaces. The framed lens may be mounted on a stand, keeping the lens at the right distance from the table, and therefore at the right distance from the object on the table. The latter applies if the object is small and also if the height is adjustable. Some magnifying glasses are foldable with built- in light. Paint Brush made of bristles set in handle is used for cleaning dirty parts of a circuit or an object. 16 Advance Electronic Equipment  Power Supply It is a reference to a source of electrical power. A device or system that supplies electrical or other types of energy to an output load or group of loads is called a power supply unit or PSU.  Signal Generator It is also known variously as a test signal generator, function generator, tone generator, arbitrary waveform generator, or frequency generator is an electronic device that generates repeating electronic signals (in either the analog or digital domains). It is generally used in designing, testing, troubleshooting, and repairing electronic or electro-acoustic devices; though they often have artistic uses as well.  Multimeter It is known as a multi-tester or a volt/ohm meter or VOM.It is an electronic measuring instrument that combines several functions in one unit. A standard multimeter may include features such as the ability to measure voltage, current and resistance. There are two categories of multimeters; analog multimeters and digital multimeters (often abbreviated DMM.) A multimeter can be a hand-held device useful for basic fault finding and field service work or a bench instrument which can measure to a very high degree of accuracy. They 17 can be used to troubleshoot electrical problems in a wide array of industrial and household devices such as batteries, motor controls, appliances, power supplies, and wiring systems. Analog Tester Digital Tester Digital Multimeter (DMM) Modern multimeters are often digital due to their accuracy, durability and extra features. In a DMM the signal under test is converted to a voltage and an amplifier with an electronically controlled gain preconditions the signal. It displays the quantity measured as a number, which prevents parallax errors. Digital Multimeter  Oscilloscope An oscilloscope (sometimes abbreviated CRO, for cathode-ray oscilloscope, or commonly just scope or O-scope) is a type of electronic test equipment that allows signal voltages to be viewed, usually as a two-dimensional graph of one or more electrical potential differences (vertical axis) plotted as a function of time or of some other voltage (horizontal axis). 18  Analog type An extra feature available in some analogue scopes is called 'storage'. This feature allows the trace pattern that normally decays in a fraction of a second to remain on the screen for several minutes or longer. An electrical circuit can then be deliberately activated to store and to erase the trace on the screen. Analog (Storage Type) Oscilloscope  Digital The digital storage oscilloscope, or DSO for short, is now the preferred type for most industrial applications, although simple analogue CRO’s are still used by hobbyists. It replaces the unreliable storage method used in analogue storage scopes with digital memory, which can store data as long as required without degradation. Digital Oscilloscope  Frequency Counter A frequency counter is an electronic instrument, or component of one that is used for measuring frequency. Frequency Counter 19  ACTIVITY SHEET 1.2 Tools, Equipment and Devices for Repairing Audio Products and Systems Instructions: 1. Do the preliminary set-up necessary before starting the use of appropriate hand tools, test instruments and personal protective equipment. 2. You must get five to six (5-6) “Yes” to have the rating of Very Good and pass the self-check 1-2 based on assessment criteria 1-2. 20  SELF-CHECK SHEET 1.1 Direction: Check the selected tools, test instruments and working manuals placed on the demonstration table. Presentation Standard Presentation Level Presentation Criteria Yes No NA 1. Are the tools in good shape? 2. Are the electronic instruments working in good condition? 3. Are the tools and electronic instruments secured and at their right position? 4. Is there a sufficient source of power supply (220V) in the outlet? 5. Is the space in the working table sufficient enough for laboratory work? 6. Does the student wear proper attire for working? 7. Does the student know how to use the service manual? If all the items obtained a Yes response, the student can move to the next lesson. Assessment Criteria 1.2 Number Of Yes Descriptive Grade 7 Excellent 5-6 Very good 3-4 Good 1-2 Fair 0 Poor 21  ACTIVITY SHEET 1.3 Service Manual for Audio Products Instruction s: 1. You should bring the following defective units:  AM – FM Radio Receiver and FM Radio Receiver  CD Player with AM – FM Radio Receiver  MP3 CD Player with AM – FM Radio Receiver  MP3 Player with AM – FM Radio Receiver 2. Let the student surf the internet or buy from the reliable source. 3. Produce a printout of the “Service Manual” which will be collected afterwards by your teacher. The teacher will use the assessment criteria 1-3 in scoring. 4. You must get a score of 7-9 to have the rating of Very Good. Assessment Criteria 1.3 No. of Service Score Descriptive Grade Manual 4 10 Excellent 3 9-7 Very good 2 6-4 Good 1 3-1 Fair 0 0 Poor 22 Program/Course CONSUMER ELECTRONIC SERVICING NCII MAINTAIN AND REPAIR OF AUDIO - VIDEO PRODUCTS Unit of Competency AND SYSTEM MAINTAINING AND REPAIR AUDIO PRODUCTS AND Module Title SYSTEM Learning Outcome 2: Diagnose Faults of Audio Products and System Assessment Criteria: 1. Systematic pre-testing procedure is performed in accordance with the manufacturer’s instructions. 2. System defects/fault symptoms are identified using the appropriate tools and equipment and in accordance with the safety procedures. 3. Results of diagnosis and testing are documented. 4. Identified defects and faults are explained. Conditions: The following resources are needed:  Equipment - AM-FM Radio Receiver - AM Radio Receiver - DVD / VCD Player - Professional audio/public address (PA) system (power amplifier) - MP3/MP4  Instruments - Signal Generator – AF / RF - Analog / Digital VOM - Oscilloscope - Power Supply - Audio Frequency Counter - Distortion Analyzer  Electronic Hand Tools 23  - Soldering Iron - Soldering Stand - Desoldering Tool - Set of Screw Driver (Philips, Flat) - Pliers o Long Nose o Diagonal Pliers - Utility Knife - Cleaning Brush  Supplies and Materials - Electronic Components - Soldering Lead - Wires - Silicon Grease - Soldering Flux - Requisition Slip  Accessories - Working clothes  Learning Materials - Work Plan - Service Manual - IC Manual - Learning Elements LEARNING EXPERIENCE / ACTIVITIES 24 LO 2: Diagnose Faults of Audio Products and sytem Learning Activities Special Instruction 1. Read the instructions in Activity Sheet 9A-2-1.  Perform Student Write-Up 2. Do the actual laboratory Activity 9A-2-1 for : Sheet 9A-2-1. - AM-FM Radio - CD/DVD Player - MP3 Player 3. Refer to the Assessment Criteria 9A-2-1. 4. If you have any questions or you need clarification on the information, ask assistance from your teacher or from your advance classmate who has finished this learning outcome (LO). 5. If you have answered all the questions and finished all the laboratory activities, you may proceed to the next learning outcome (LO). ACTIVITY SHEET 2.1 25  Common Symptoms / Defects of Audio Products and System Instructions: 1. Provide a service manual of each of the following:  AM – FM Radio Receiver and FM Radio Receiver  CD Player with AM – FM Radio Receiver  MP3 CD Player with AM – FM Radio Receiver  MP3 Player with AM – FM Radio Receiver 2. Listen as the teacher discuses the different service manuals and share his/her troubleshooting experiences on audio equipment. 3. Analyze the defective unit and provide a write up to be submitted to your teacher. You will be graded based on the analysis you made on the defective unit. 4. Student should get the grade of 85 (Very Good) to pass the laboratory activity based on the assessment criteria 2-1. STUDENT WRITE UP 2.1 26  Common Symptoms / Defects of Audio Products and System Student : _____________________ Date: _______________ Grade: _______________ Year & Section: ___________________________ Teacher: ________________________ ADMISSION SLIP UNIT BRAND : _________________________ Unit Model: ______________________ Owner: __________________________ Address: ________________________________ Direction: Interview the owner of the unit regarding his/her complaint/s. 1. Problems and Symptoms : ___________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ ____________________________________________________ Teacher’s Initial: _______ STUDENT WRITE UP 2.2 27  Diagnosing Faults in Audio Products and Systems Student : _____________________ Date: _______________ Grade: _______________ Year & Section: ___________________________ Teacher: ________________________ ADMISSION SLIP UNIT BRAND: _________________________ Unit Model: ______________________ Owner: __________________________ Address: ________________________________ Direction: Conduct a preliminary test in the unit to determine the possible cause of the problem. 1. Possible Cause: _______________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Teacher’s Initial: _______ TEACHER-CHECK SHEET 2.1 28  Common Symptoms / Defects of Audio Products and Systems AUDIO PRODUCT & SYSTEM Item Troubleshooting 70 75 80 85 90 95 100 Score no. Techniques 1 Radio Receiver 2 CD / DVD Player 3 MP3 Player Average -------- Assessment Criteria 2.1 Score Descriptive Grade 96-100 Excellent 86-95 Very good 81-85 Good 75-80 Fair 70-74 Poor 29 Program/Course CONSUMER ELECTRONIC SERVICING NCII MAINTAIN AND REPAIR OF AUDIO – VIDEO Unit of Competency PRODUCTS AND SYSTEM MAINTAINING AND REPAIRING AUDIO PRODUCTS Module Title AND SYSTEM Learning Outcome 3: Maintain and Repair Audio Products and System Assessment Criteria: 1. Defective parts/components are replaced with their appropriate equivalent. 2. Repaired parts/components are soldered in accordance with current best practices in industry. 3. Substitutions of parts are done in accordance with manufacturer’s specifications. 4. Repair activity is performed within the required time frame. 5. Care and extreme precaution in handling the unit/product are observed. Conditions: The following resources are needed:  Equipment - AM-FM Radio Receiver - AM Radio Receiver - DVD / VCD Player - Professional audio/public address (PA) system (power amplifier) - MP3/MP4  Instruments - Signal Generator – AF / RF - Analog / Digital VOM - Power Supply 30  - Audio Frequency Counter  Electronic Hand Tools - Soldering Iron - Soldering Stand - Desoldering Tool - Set of Screw Driver (Philips, Flat) - Pliers  Long Nose  Diagonal Pliers - Utility Knife - Cleaning Brush  Supplies and Materials - Electronic Components - Soldering Lead - Wires - Requisition Slip  PPE Accessories - Working clothes - Hand Gloves - Mask - Goggles  Learning Materials - Work Plan - Service Manual - IC Manual - Learning Elements 31  LEARNING EXPERIENCE / ACTIVITIES LO 3: Maintain and Repair Audio Products and System Learning Activities Special Instruction 1. Read the instruction in Activity  Perform Student Write-Up Sheet 9A-3-1. 9A-3-1 for : - AM-FM Radio 2. Do the actual laboratory Activity - CD/DVD Player Sheet 9A-3-1 - MP3 Player 3. Refer to the Assessment Criteria 9A-3-1. 4. If you have any questions or you need clarification on the information, ask assistance from your teacher or from your classmates who have finished this learning outcome (LO). 5. If you have answered all the questions and finished all the laboratory activities, you may proceed to the next learning outcome (LO). 32  ACTIVITY SHEET 3.1 Repairing a Defective Audio Products Instructions: 1. Provide a service manual of each of the following:  AM – FM Radio Receiver and FM Radio Receiver  CD Player with AM – FM Radio Receiver  MP3 CD Player with AM – FM Radio Receiver  MP3 Player with AM – FM Radio Receiver 2. Listen as your teacher discusses the different service manuals – schematic diagram together with the use of electronic hand tools and test instruments. 3. Continue to analyze troubleshoot the defective component/s. 4. Come up with a write - up to be submitted to your teacher. You will be graded based on the output production activity you have accomplished. 5. You should get a grade of 85 (Very Good) to pass the laboratory activity based on Assessment Criteria 3-1. 33  STUDENT WRITE-UP 3.1 Troubleshooting Technique Student : _____________________ Date: _______________ Grade: _______________ Year & Section: ___________________________ Teacher: ________________________ ADMISSION SLIP BRAND NAME : _________________________ Unit Model: ______________________ Owner: __________________________ Address: ________________________________ Direction: You will now test the unit with the use of electronic instruments, hand tools and schematic diagrams. CORRECTION/S: _________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ ___________________________________________________________________________ __________________________________________________________________________ REMARK/S : _______________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ Teacher’s Initial: ______________ 34  TEACHER-CHECK SHEET 3.1 Common Symptoms / Defects of Audio Products and System AUDIO PRODUCT & SYSTEM Item Troubleshooting 70 75 80 85 90 95 100 Score no. Techniques 1 Radio Receiver 2 CD / DVD Player 3 MP3 Player Average -------- Assessment Criteria 3.1 Score Descriptive Grade 96-100 Excellent 86-95 Very good 81-85 Good 75-80 Fair 70-74 Poor 35  ASSESSMENT PLAN Evidence Checklist Competency standard: CONSUMER ELECTRONIC SERVICING NC II Unit of competency: MAINTAIN AND REPAIR AUDIO - VIDEO PRODUCTS AND SYSTEM Title of Module MAINTAINING AND REPAIRING AUDIO PRODUCTS AND SYSTEM Ways in which evidence will be collected: Oral Questioning [tick the column] Demonstration Observation Third party Portfolio Written Report The evidence must show that the student …  Cleaned work station for repair activities in line with the company requirements.  Prepared necessary tools, test instruments and Personal Protective Equipment in accordance with their application or use.  Acquired service manuals and service information required for repair and maintenance.  Observed systematic pre-testing procedure in accordance with manufacturer’s instructions.  Identified system defects/fault symptoms using appropriate tools and equipment and in accordance with safety procedures.  Documented results of diagnosis and testing.  Explained identified defects and faults to the teachers.  Replaced defective parts/components with their recommended appropriate counterparts.  Soldered repaired parts/components at the specific.  Replaced parts in accordance with the manufacturer’s specification.  Performed repair activity within the required time frame.  Observed care and extreme precaution in handling the unit/product is observed. NOTE: Critical aspects of competency Prepared by: Date: Checked by: Date: 36 Observation Checklist Student’s name: Teacher’s name: Assessment Center Competency standards Unit of competency: Instructions for the assessor: 1. Observe the student in maintaining and repairing audio products and system 2. Describe the assessment activity and the date when it was undertaken. 3. Place a tick in the box to show that the student has completed each aspect of the activity to the standard expected in the enterprise. 4. Complete the feedback sections of the form. Date of observation Description of the assessment activity Location of the assessment activity The student can… If yes, tick the box  Clean work station for repair activities in line with the company requirements.  Prepare necessary tools, test instruments and Personal Protective Equipment in accordance with their application or use.  Acquire service manuals and service information required for repair and maintenance.  Acquire service manuals and service information required for repair and maintenance.  Observe systematic pre-testing procedure in accordance with manufacturer’s instructions.  Identify system defects/fault symptoms using appropriate tools and equipment and in accordance with safety procedures.  Document results of diagnosis and testing.  Explain identified defects and faults to the teachers.  Replace defective parts/components with their recommended appropriate counterparts.  Solders repaired parts/components at the specific.  Substitute of parts in accordance with the manufacturer’s specification.  Perform repair activity within the required time frame.  Observe care and extreme precaution in handling the unit/product. Did the student’s overall performance meet the standard? Yes No Teacher’s Feedback: Teacher’s signature: Date: 37 Observation and Questioning Checklist Student’s name: Teacher’s name: Assessment Center Competency standards Unit of competency: Instructions for the assessor: 1. Observe the student in maintaining and repairing of audio products and system. 2. Describe the assessment activity and the date when it was undertaken. 3. Place a tick in the box to show that the student has completed each aspect of the activity to the standard expected in the enterprise. 4. Ask the student a selection of the questions from the attached list to confirm his/her underpinning knowledge 5. Place a tick in the box to show that the student has answered the questions correctly. 6. Complete the feedback sections of the form. Date of observation Description of the assessment activity Location of the assessment activity The student can If yes, tick the box  Clean work station for repair activities in line with the company requirements.  Prepare necessary tools, test instruments and Personal Protective Equipment in accordance with their application or use.  Require service manuals and service information required for repair and maintenance are acquired.  Observe systematic pre-testing procedure in accordance with manufacturer’s instructions.  Identify system defects/fault symptoms using appropriate tools and equipment and in accordance with safety procedures.  Document results of diagnosis and testing.  Explain identified defects and faults to the teachers.  Replace defective parts/components are replaced with their recommended appropriate counterparts.  Solder repaired parts/components at the specific.  Substitute of parts in accordance with the manufacturer’s specification.  Perform repair activity within the required time frame.  Observe care and extreme precaution in handling the Yes No unit/product. Did the student’s overall performance meet the standard? 38 Demonstration Student’s name: Teacher’s name: Unit of competency: Competency standards: Date of assessment: Time of assessment: Instructions for demonstration Given the necessary materials the trainee/student must be able to: Materials and equipment: Signal Generator Audio Frequency Counter AM/FM Radio Multitester Distortion Analyzer Soldering Lead Oscilloscope MP3/MP4 Soldering Iron Power Supply VCD/DVD Player Soldering Stand  to show if evidence is demonstrated During the demonstration of skills, did the student can…. N/ Yes No A  Clean work station for repair activities in line with the    company requirements.  Prepare necessary tools, test instruments and Personal Protective Equipment in accordance with their application    or use.  Acquire service manuals and service information required for repair and maintenance are acquired.     Observe systematic pre-testing procedure in accordance    with manufacturer’s instructions.  Identify system defects/fault symptoms are identified using appropriate tools and equipment and in accordance with    safety procedures.  Document results of diagnosis and testing.     Explain identified defects and faults to the teachers.     Replace defective parts/components with their    recommended appropriate counterparts.  Solder repaired parts/components at the specific.     Substitute of parts in accordance with the manufacturer’s    specification.  Perform repair activity within the required time frame.     Observe care and extreme precaution in handling the    unit/product. The student’s demonstration was: Satisfactory  Not Satisfactory  39 Written report Student’s name: Teacher’s name: Assessment Center Competency standards Unit of competency: Task: Your task is to:  Maintain and repair audio products Submission date: Use the checklist below as a basis for judging whether the student’s report meets the required competency standards. The student’s report states that he/she can… If yes, tick the box  Clean work station for repair activities in line with the company requirements.  Prepare necessary tools, test instruments and Personal Protective Equipment in accordance with their application or uses.  Acquire service manuals and service information required for repair and maintenance.  Observe systematic pre-testing procedure in accordance with manufacturer’s instructions.  Identify system defects/fault symptoms using appropriate tools and equipment and in accordance with safety procedures.  Document results of diagnosis and testing.  Explain the identified defects and faults to the teacher.  Replace defective parts/components with the recommended appropriate counterparts.  Substitute parts in accordance with the manufacturer’s specification.  Perform repair activity is within the required time frame.  Observed care and extreme precaution in handling the unit/product. Overall did the Student’s report meet the standard? Yes No Comments: Student’s signature: Date: Teacher’s signature: Date: 40  PERFORMANCE TEST Student's Name Date Test Attempt Competency: 1st 2nd 3rd Directions: OVERALL EVALUATION Level Ask your teacher to assess Achiev PERFORMANCE LEVELS your performance in the ed following critical task and 4 - Can perform this skill without direct performance criteria below supervision and with initiative and adaptability to problem situations. You will be rated based on the 3 - Can perform this skill satisfactorily without overall evaluation at the right direct assistance or supervision. side. 2 - Can perform this skill satisfactorily but requires some assistance and/or supervision. 1 - Can perform parts of this skill satisfactorily, but requires considerable assistance and/or supervision. Teacher will initial level achieved. PERFORMANCE STANDARDS For an acceptable achievement, check YES, for an unachieved Yes No N/A skill, check NO and for a skill displayed inappropriately check N/A.  Work station was cleaned for repair activities in line with the    company requirements.  Necessary tools, test instruments and Personal Protective Equipment are prepared in accordance with their application or    use.  Service manuals and service information required for repair and maintenance are acquired.     Service manuals and service information required for repair and    maintenance are acquired.  Systematic pre-testing procedure is observed in accordance with    manufacturer’s instructions.  System defects/fault symptoms are identified using appropriate    tools and equipment and in accordance with safety procedures.  Results of diagnosis and testing are documented.     Identified defects and faults are explained to the teachers.     Defective parts/components are replaced with their    recommended appropriate counterparts.  Repaired parts/components are soldered at the specific.     Substitutions of parts are done in accordance with the    manufacturer’s specification.  Repair activity was performed within the required time frame.     Care and extreme precaution in handling the unit/product were    observed. 41